Key action for typewriters and other machines



June 17, 1930.

0. u. DESHA KEY ACTION FOR TYPEWRITERS AND OTHER IACHI NES Filed Jan.27, 1928 2 Sheets-Sheet 1 2 P 7//r//////// I June 17, 1930. o. u. DESHA1,765,326

KEY ACTION FOR TYPEWRITERS AND OTHER MACHINES Filed Jan. 27, 1928 2Sheets-Sheet 2 Patented June 17,1930 7 s ear rice ORVILLE U. DESI-IA, FFORT COLLINS, CULOEADO, ASSIGNOR OF ONE-FIFTH TO THE DESI-IA TYPELEXTRUST ESTATE, 0F FORT COLLINS, COLORADO Application filed January 27,1928. Serial No. 249,878.

' In regard to certain more specific features thereof, my inventionrelates to improve ments in the associated and coasting parts of a keyaction and mechanism, comprising coacting means alternativelyinterlocking and disinterlocking the interpositioned parts connectingthe type bar and key lever-the coacting incident of operativelyinterlocking the intermediate mechanism moving the type bar toprintingpoint upon depression of the key lever and an alternative disinterlocleing of said means returning the type bar to normal position While thekey lever is in depressed position; also including coacting means forrestoring said disinterlocked elements to normal operative interlockedposition upon release of the key lever, as a contradistinction betweenprevious devices comprising actuating means at all times operativeconnectin the type bar a'nd key lever to move, the type bar to printingpoint upon depression of the key lever and means actuat ing saidconnection to return the type bar to normal position after the printingimpac While the key lever is in depressed position, the latter broad obect being the subject matter ot'an application filed by me November th,1923, Serial No. 672,871, uponwhich Patent 1,65%,203 issued Sept. 20,1927. "lhe applicant also endeavors to point out a clear distinctionbetween this and his 7 copend'ing applications Serial No. 55,227 filedSeptember 8, 1925 and Serial Nos. 178,883, We s-i, 178,085, 178,088,178,087, 178,088 and 178,089 filed March l, 192T. i I i i Among theobjects of the present inven-v tion the applicant has endeavored":First, to improve the enacting parts between the key lever and type barwhich vVlllPl'OVlClfi, an'iong other features, a keyacti which will beeilicient in use, rapid,'1"eliabie and silent in operatiomand whichshall have a light touch for operating the type bars, and reduce theliability or the type to collide or pile when operated at high speed.Second To providea key mechan sm of the abov'echara'eter having fewparts simple in construction Whicl'i will becheap to n'ianutaeture,conveni'ent and easy to arranger'and assemble compactly, and construct akey mechanism as to be but little likely to get out of order in usualoperation. My invention, accord in Qly, consists in certain combinationsof elements, features of construction, and arrangement of part-s, thatmay readily be incorporated in certain typewriting machines with onlyslight modification of the structural features of said machines as theynow exist, exemplified inthe construction hereinafter set forth, whichWill be more readily understood from an inspection of the accompanyingtwo sheets of drawings and the following specilication, the scope of theinvention being indicated in the appending claims.

Myinvention is especially applicable to the usual hand operatingmachine, as distinguished from a motor driven machine, and is shown inthe present case embodied in a machine similar to the Royal standardtypewriter. ,It should be understood,however,

that the invention is notrestricted to use ina machine of this type,butmay be employed Wherever found available. I

Theapphcant has endeavored to disclose and describe the construction ofthe mechanism and manner of its operation and its use in languagecomprehensible to those versed or skilled in the art whowould make oruse the device, sui'licient to satisfy the requisite of thisapplication, Without enumerating every obvious object and advantage, orpointing out all the diiiiculties and troubles wvliicli' are cured orameliorated by his improvement over the present state of the art. thefollowing being a brief description of the several views of thedrawings: I lea sectional elevation of a typevvritingmachine takenlongitudinally and about centrally thereof, constructed in accordancewith my invention and showing elements of one key action only innormalposition, and also showing so much of the usual mechanism of the machineas is necessary to illustrate how my invention may be embodied therein.Fig. Ill, represents a View of the key action similar to Fig. I, the keylever being shown depressed and responding the type 'Fig. II, is'agreatly enlarged sectional View of the reversel breakineroller tri 3 conlin hereinaf er describfid. Fig In is a key mech' anism similarto Fig.I, the key lever being shown in a depressed position and the type barresponding to printing position.

I, the key lever being shown in a depressed position and the type barreturned to its initial position. In this manner the key lever may beheld down to its limit of movement and the type bar will complete itsincident of response to effect the printing and move out, ofengagementwith the platen and con plete its. cycle of movementregardless of whether or not the k y lever is released, thus relievingthe key lever of work during the impact printing operation.

lowing detailed description sets inc I forth the best mode in which theapplicant has contemplated applying the invention. lit is understood, ofcourse, that for the sake of clearness and to avoid complication ofdrawings, elements of the complete machine already known'to the art,constituting no part of the present invention, and statements of mereobvious facts, are omitted. In the ac companying drawings similarreference characters indicate corresponding parts in the several views,and in order to facilitate observance of a clear distinction betweenthis and copending applications, the reference characters also indicate,as far as practical, the corresponding parts in the several views of mycopending applications. referred to above. n the embodiment in Fig. I,more in detail, in which one form of type action is shown as applied toa typew 'i'ting machine to which it is particularly adapted, 1 indie testhe typewriter frame1indicating the front and 1 the rear. 5 indicates acommon platen mounted as usual to travel longitudinally across the rearupper portion of the machine upon a carriage mechanism. As the carriagemechanism forms no part of the presentinvention, specific disclosure anddescription thereof is omitted, asits broad function is well known. 5indicates one of a series of type bars being radially arranged in acurved row about the same center and are movable about their fulcrumpivot rod 9 on atype bar segment 10, Fig. Lfroin a horizontal orforwardly extending radial position E as the type 7 forms the arc ofvibration G and'is brought iinst the front face of plateno to a commonprinting point A, to an upright radial position as shown by radius F. 12indicates one of a series of key levers carrying atthe frontend lingerkey 13, the rear end pivoted at 14 to bar l in the rear of the machine.and is kept normally in 1ts elevated position by the usualspring 15supported by bar 15, at normal rest the keylever bearing against theunderside of the buffer bar 30 abovethe key lever 12. The key lever 12is formed with any upward curved arm 16 convened hackwardly 16 andconcaved'forwardly in the forward concavity thereof provid- Fig. IV isalso a key mechanism similar to Fig;

ing an operative plane, forwardly of said armthe key lever, limiting thedownward move-- ment of the latter. 18 indicates one of a series ofrearwardly disposed vibratory levers corresponding in number with thetype bars 6 and key levers 12. Forward ends of the vibratory levers l8pivoted at 19 suppor ed by a bar 20, Fig. 1, extending across themachine near the front of the latter. 21 indicates a forward pull link,rear end thereof operatively connecting the type bar 6 at 6 and theforward end operatively connecting the vibratory lever 18 at 18. 21 is afixed stop collar near the center of the forward pull link 21, and 21 isa spring support fixed near the rear end of said pull link 21. Said stopcollar 21 and support 21 being preferably integral with said pull link.22 indi cates a depending trip lever operatively connecting thevibratory lever-'18 at 25 intermediately the ends of the latter, andextends downwardly, and operates radially in a plane above the keylever. 24: indicates a trip roller bob carried by the lower end of thedepending trip lever 22 operating within the forward concave planeprovided by the upward curved key lever arm 16, said trip roller bobcommunicating and operatively interlocking with. the roller grip 26.carried by said key lever arm 16. It is necessary that depending triplever 22be of such length and of such form as to permit the normalposition of the roller grip 26 to operate between the pivotal connection25 and trip roller bob 2st that said trip roller bob 24 may cross andrecross a reversely breaking line 5 J drawn from pivot 25 diametricallythrough roller grip 26, thereby permitting the elements of'said re:versely breaking roller trip coupling to be interlocked, Fig. l, movingthe type bar 6 to printing point upondepression of the key lever andsaid parts trip out of interlocked position, Figs. ll, HI and IV, Iwhile the type bar returns to normal position; the characteristic formof the depending trip lever 22 being preferably convened forwardly andthe upper part beingstraight. The

roller grip 26 is spoolshaped comprising a roller head and roller head26 on either side of the dependingtripjlever 22. F 11.

One of the roller heads, 26 provides a hol-' low cylinder hub 26 formingthe pivotal" roller bob 24 is identical to that of the roller grip 26, F1g, Il except that it is'preferable therefore is mixtilineal, the lowerpart;

that the trip roller bob 24 be relatively smaller diametrically than theroller grip 26, the difference in diametrical size enables the smalltrip roller bob 24, to more readily move to the rear of the aXle 26 ofthe roller grip 26, thereby enabling the latter to more firmly grip thetrip roller bob 24 in operative interlocked position, as shown in Fig.I. 27 is a pull wire spring, the forward end thereof supported by theslidable sleeve 28. the rear end supported by a fiZ-IBCl support 21 Thisspring is hereinafter described as a return spring. The return spring 27moves bodily with the actuating parts intermediately of the type bar andvibratory lever, the,

tension of said spring being dormant or inoperative allows momentum toaccelerate the movement of the type bar to prinitng point unrestrainedby the tension of said spring upon relatively light depression strokeofthe key lever, the latter being also relieved of energizing said springwhile operating the type bar. 28 is an actuating thrust rod, the rearend thereof is pivoted at 28 to a slidable sleeve 28 28 carried by theforward pull link 21, and the forward end of said actuating thrust rod28 is pivoted at 28 to the depending trip lever 22 intermediately theends of the latter? The slidable sleeve is formed with an aperture orspace between the two slidable parts 28 and 28 exposing a part of saidforward pull link between said slid able parts with an integralconnection 28 connecting the slidable parts 28 and 28 beneath theexposed part of said forward pull link. The stop collar 21 is fixed onsaid forward pull link between the slidable parts 28 and 28 of saidsleeve, the slidable parts 28 and 28 of said sleeve alternatelycommunicating with said fixed collar within said aperture.

It is important that perfect operative alignment of the enacting treadsof the respective trip roller bob 24 and roller'grip 26" be maintained,therefore, 29,.Fig. III, indicates a toothed guide. extending across thefront part of the machine comprising a series of horizontally disposedteeth 29 corresponding in number with the vertically disposed teeth 29*.

The lower part 22 of the depending trip lever operates between two ofsaid. horizontally disposed teeth, and the key lever 12 operatingbetween the two corresponding vertically disposed teeth. This toothedguide, therefore, at all times effects perfect operative alignment ofthe coacting treads of the respective trip roller bob 2% and roller grip26. 30 is a return buffer bar supported within the lower angle of thetoothed guide 29 preadjustable by a screw 30 in a slot 30 at either endof the toothed guide; said buffer bar being preferably an intricate partof the key lever stop 30*. The rear face of the buffer bar 30 isprovided with a noise absorbing cushion deadening the impact percussionwhen struck by the front edge of the lower part 22 of the depending triplever 22 limiting the forward movement of the latter, the

function of the buffer bar hereinafter being more fully described.

The new mechanical structure, combination of parts and operation thereofare the important factors of the invention in providin g the desiredfunction of the key action, a further description of the operativeprinciple, therefore, follows:

Thekey lever 12 is described as having two incidents of operation beforecompleting its operative cycle, namely: the incident of depression andthe incident of release. The in cident of depression is disclosed by themovement of the key lever 12 from radius B to radius C, and the incidentof release is dis closed by the movement of the key lever 12 back fromradius C to radius B. bar 6 is described as having two incidents ofoperation, before completing its operative cycle, namely: the incidentofresponse and incident of recoil. The incident of response of the typebar 6 is disclosedliy the movement of the type bar from its initial restradius E to printing}; point A, at radius F, formingarc G from pivot 9.The incident of recoil of type barb is disclosed by its movement fromthe printing point A back to normal rest E thereby completing itsoperative cycle. These incidents of operation are, of course, common innonreversely breaking type bar actions in so far as the incident ofresponse, E to A, of the type bar 6 occurs simultaneously with theincident of depression, B to C, of the key lever 12, and the incident ofrecoil, A to E, of the type bar occurs simultaneously with the incidentof release, C to B, of the key lever. In other Words, the operativecycle of the type bar and that of the key lever are simultaneous in'anonreversely breaking connection, but the broad function inherent to thepresent key action relative to thecorrelation of incidents of operationof the key lever with that of the type bar is in providing the operativeexpedient by which both the incident of response,'E to A, of the typebar and the incident of recoil, A to E, occur during the one incidentofdepression, 13 to C, of the key The type i lever, the type barcompleting its'operative In this case it will be observed that the operalive cycle of the vibratory lever 18 and that of the forward pull link21 are simultaneous with the operative cycle of the type bar, and

the operative cycle of the depending trip position while the key leveris in depressed position the detail mechanism of said coacting rollertrip later described as disclosed in Fig. 11*. Upon a rapid operation ofthe key lever, the alternative disengagement of the elements of thereversely breaking roller trip coupling 24: and 26 permits momentum 'tocarry the type bar 6 from its normal position E relatively faster thanits corre'sponding key lever allowing the type bar 6 to complete itsincident of response, E to F and return from F to E by the time the key.lever completes its incident of depression B to C and stopped by thekey lever rest 17. In other words the recoil impact of the type bar atthe type bar rest 11 is substantially simultaneous with the impact ofthe key lever at 17, the type bar completing its cycle of movement whilethe key levers cycle, of movement is only half complete. In order toaccelerate the rapid response and recoil of the type bar by overcominggravity, the weight 01" the intermediate mechanism is utilized tocounterbalance the weight of the type bar by prearranging the point ofdisconnection as nearthe key lever as possible.

A further description et-the key action follows: Dotted line M M,indicates the correlative relationship of the elements otth'e reverselybreaking roller trip coupling during process of operation, namely.dotted line M M, Fig. I, shows where the actuating thrust rod 28 bymeans of spring 27 holds the depending trip lever 22 normally inoperative interlocked position with the key lever arm 16. In normalposition the trip roller bob 24, at the lower end of the depending triplever 22, is interlocked behind a reversely breaking line J J drawnthrough the upper border pivot 25 of the actuating plane thence downwarddiametrically through the roller grip 26. At this stage of operation itwill be seen that the roller grip 26 carried by the key lever arm 16 iswithin the backward concavity of the depending trip lever 22. Thisposition operatively interlocks the elements 24 and 26 of said reverselybreaking roller trip coupling effecting response of the type bar 6 upondepression of the key lever. Dotted line M M, Fig. ll, shows where theactuating thrust rod 28 by means of its supfixed collar .21, hasdiverted the downward movement of the depending trip lever 22 forwardlyand has thereby moved the trip roller bob 24 forwardly across and infront of the rcversely breaking line J J, the elements otthe reverselybreaking roller trip coupling assuming this position about the time thetype balm; responds to about one-halt oil its incident of re rouse, asshownby Ea in Fig. ll the momentum of th type b r completirigtheincident or .sponse of the latter to printing point a, as shown in Fig.Ill- At this stage of operation it will be seen thatthe roller grip iswithout the backward concavity of the depending trip lever The ctlon ofthe coacting' lever roller trip ments .Zand 26 from their normalposition Fig. l. to the position shown Fig. H is unitary i. e. theseelements each revolves on its axis in unison as it they formed a linkinstead of taeir treads rolling togethentheir pivotal movementminimizinnfriction and lessening wear. Dotted line M M, Fig. Ill

shows where he actuating thrust rod 28 has J J, the treads of the roller.1 being disengaged or disconnected. Dotted lino M Mpl ig. IV, shows.where the actuating thrust rod 28 has diverted t downward moven'ient otthe 'de pending trip lever 2 forwardly and moving the trip rol. bob 24.-forwardly and upward ly in front of the r 'erscly breaking line J J,permitting the type bar 6 to recoil while the key. lever remains indepressed position In a reversely braking key action it is desirablethat means he provided whereby the key lever may have a relatively shortdepression stroke for actuati a full response stroke of the type lit toprinting point. Inherent to the present reversely breaking tey actionthe type bar being unrest ained by the absence of a l' silk conne keylever. m n ntuin carries the type bar 6 to theprinting point A withefiicacious i1npression upon arelatively short depre: ion stroke of theke lever a contradistinction between the rigid or link connectionbetween the key lever and type bar of llOlQl'QX QlSQlY breaking keys. '5his operative expedient is accomplished inns case by the ahfernativedisenga ement of t re elements of said reversely breaking roller tripcoupling in the following manner: Ey e .erring toFigs. I and II, it willbe seen that the normal operative position of the treads ot the coactingroller trip elements '7 'wardly away from the reverselv ion between itand the operation the key lever has reached the limit of its depressionstrokc,.the' latter being stopped by the key lever arrestor 17, and themomentum of the type bar continues the movement of the latter toprinting point. The type bar (3, of the present invention therefore, maybe operated with about onefourth of an inch to three-eights an inchstroke of finger key 13 contrasted with the usual iive-eights of an inchinherent to a non-reversely breaking key action. I

Inherent to the common noiseless key mechanism, the printing operationis formed by pressure incontradistinction to impact; and the timeactually used in making impression by pressure is usually relativelylonger than that required by the impact of a type with its movementaccelerated by momentum. The generic structure of the presentkeymechanism, therefore, is similar to that which forms the printingoperation by impact, however, the applicant endeavors to provide a typeaction in this case which may coordinate inherent rapidity of operationwith inherent silence of impression. In other words, coordinate the inheout qualities of a noiseless key action with the inherent qualities of arapidity characterized by efficacious impact.

This operative expedient is accomplished by,

the buffer bar 30 arresting the forwardly diverted movement of thedepending trip lever 22 and in turn stopping the forward thrust of theactuating thrust rod 28 and the actuating thrust rod 28 stopping theforward movement of the slidable sleeve 28 which in. turn communicateswith the forward end of the lined stop collar 21 preventing furtheractuating movement of the forward pull link 21. The actuating movementof the intermediate elements may be limited by the buffer bar 30 set toarrest the forwardly diverted movement of the depending trip lever 22just before the type 7 strikes the platen at printing point A, theinherent resiliency of the buffer bar 30 thus absorb the momentum of thetype bar, permitting the latter to complete its sector of movement withcoordinate rapidity and silent impression, disclosing the first functionof said buffer bar.

The applicant also endeavors to provide a key action wherein theincident of recoil of the type bar is relatively quicker than theincident of its response in order that the type are G may be cleared asrapidly as possible when several keys are being manipulated in rapidsuccession. It will be'seen that the energy manifested by the tensionstrain under" which the intermediate mechanism between the type bar andkey lever is subjected to incident of response, disclosing the secondfunction of the buffer bar 30.

However, where there is no connecting means to retard the recoil of thetype bar, and its recoil is further accelerated by the second functionof the bu tier bar 30, described above, the excessive recoil percussionof the type bar with the cushion rest 11 is also inherent to a reverselybreaking roller trip coupling. The applicant, therefore, endeavors, inthis case, to provide a key action whereby the recoil of the type bar isabsorbed by means which substantially neutralizes the recoil percussionof the type bar with the cushion rest 11, in the following manner: Byreferring to II, it will be seen that while the key lever 12 remainsdepressed, the recoil of the type bar relieves the tension strain uponthe intermediate parts occasioned by the buffer bar 30 absorbing themon'ientum of the type bar, permits the depending trip lever 22 to againpartially recoil carrying with it the trip roller bob back in treadlecontact with the roller grip 26, and retards the depending trip lever 22at its forwardly divertic position. in turn the actuating thrust rod 28,by means of the slidable sleeve 28?28 retards the forwardend of spring27, and tire type bar 6 continues to recoil, Fig. IV, it in turncontinues topull the link 21 baclrwardly, and, by means of the fixedspring su port 21 carried by said forward pull link, the recoilof the,type bar expandsor energizes said spring 27. It this process ofenergizing the splin 27 which counterbalances the mayor p:

energy of the type bar 6, thereby neutraliz-' ing the recoil percussionof the type bar contacting with the cushion rest 11, disclosing thefirst function of return spring 27. o

By referring to Fig. IV, it'will be seen that while the key lever isheld depressed the coacting treads of the trip roller bob 2% and theroller grip 26 are disinterlocked yet are in a communicative positionand the rear slidable part 28 of the slidable sleeve is in communicationwith the stop collar 21*, this position prearranged to also absorb theex cessive recoil percussion of the type bar 6 occasioned by its contactwith the cushion rest 11. p

it is equally important that reliable and rapid means be provided forrestoring the elements 2% and 26 of the reversely breaking roller tripcoupling to normal operative position upon release of the hey lever.This is accomplished by the second function of the return spring 27 inthe following manner: it will be noted, in Fig. IV, that the recoil ofthe type bar 6 to normal position, by means of the forward pull link 21and fixed support 21 moving backwardly, has expanded or energized thereturn spring 27 and the fixed stop collar 21 carried by the forwardpull link 21 has moved backwardly away 't of the recoiling from theslidable sleeve 28, and upon release of the key lever 12, as shown inFig. l, the energy of return spring 27 moves the slidablo sleeve 28backwardly against the fixed collar 21 and simultaneously the actuatingthrust rod 28 pulls the depending trip lever 22 backward arrdagaininterlocking the trip roller bob 2% with the roller grip behind thereversely breaking line J J. it will be seen that should the key leverbe released before the type bar has recoiled, the return spring 27 wouldstill effect the interlocked posit on of the element." 24 and 26 thereversely breaking coupling and no matter how successively rapid the keylever may be operated the return spring 2? restores the alternativelydisinterlocked elements to normal operative interlocked position equallyas rapid.

Finally it will be seen that the present invention provides a simple andpractical type action which will be rapid and etiieient in use,accomplishing, among others, all of the objects and advantages above setforth, therefore the operation and method of use of a type action ofthis character is believed to be perfectly clear from the abovedescription, a reiteration thereof is believed to be unnecessary. Asmany changes could be made in the above construction and many apparentlywidely different embodiments of this invention could be made withoutdeparting from the scope thereof, it is intended that all mattercontained in the above description, or shown in the accompanyingdrawings, shall be interpreted as illustrative and not in a limitingsense, and variations may be resorted to within the scope of theinvention, and portions of the improvement may be used without others.-

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. In a key action for typewriter and other n'iarhines, type bar, a.rearwardly disposed vibratory lever pivotedly supported by a barextending across the front of the machine, means opcratively connectingthe type bar and vibratory lever, a depending trip lever actuating saidvibratory lever, a :ey lever, an upward curved arm intermediate the endsof the key lever forming an integral part of t 1e latter and said armconvexed backwardly and concaved forwardly, a reversely breaking rollertrip coupling comprising a trip roller bob supported by the dependingtrip lever, and a roller grip supported by the key lever arm, theforward concavity of said arm providing an operative plane forwardlythereof and above the key lever for the operation of said trip rollerbob for operatively interlocking the elements of said roller tripcoupling moving the type bar to printing point upon depression of thekey lever, means disinterlocking said coupling and simultaneously returning the vibratory lever, type bar and immediate connection to normaloperative posi tion while the key lever is, held depressed, meansrestoring said disinterlocked elements to normal operative interlockedposition upon release of the key lever.

2. In a key action for typewriting machine, a type bar, a key lever, arearwardly disposed vibratory lever, the forward ends thereof pivotedlysupported by a bar extending across the machine near the front of thelatter, the operative cycle of said vibratory lever being simultaneouswith the operative cycle of the type bar, means operatively connectingthe type bar and vibratory lever comprising a forward pull link, areversely breaking roller trip coupling operatively interlocking thedepending trip lever and key lever moving the type bar to printing pointupon depression of the key lever, a slidable sleeve carried by saidforward pull link, an actuating thrust rod operatively connecting saidsleeve and depending trip lever reversely breaking said roller tripmechanism after printing impact of the type bar for returning thevibratory lever, forward pull link and type bar to normal operativeposition while the key lever is in depressed position, means restoringsaid disinterlocked elements to normal operative interlocked positionupon release of the key lever.

in a ty 'iewriting machine, atype bar, a key lever providing an integralarm curved upwardly and forwardly, a rearwardly disposed vibratory leverin front of the-machine, a trip lever operatively depending fron'isaidvibratory lever, a reversely breaking roller trip coupling operativelyinterlocking the depending trip lever and key lever arm, a forward pulllink connecting the type bar and vibratory lev 1' moving the type bar toprinting point upondepression of the key lever, an actuating thrust rodsupported at its forward end by the depending trip lever intermediatelyth ends of the latter, a fixed stop collar near the center of theforward pull link, a slidable sleeve carried by said forward pull linkreverse-1y breaking said roller trip coupling for returning thevibratory lever, forward pull link and type bar to normal operativeposition while the key lever is in depressed position, means restoringsaid disinte locked elements to normal operative interlocked positionopon release,

of the key lever.

i. In a key action, a type bar, a key lever formed with an upward arm, avibratory lever rearwardly disposed, a forward pull link operativelyconnecting the type bar and vibratory lever, a d pending trip leveractuatinn said vibratory lover, a reversely breaking roller tripcoupling moving the type bar to printing point upon depression of thekey lever, a slidable sleeve carried by said forward pull linkcomprising two slida-ble parts with an aperture between said slidableparts, an integral sleeve bar connecting the slidable parts of saidsleeve, an actuating thrust rod connecting the integral sleeve bar anddepending trip lever, a fixed stop collar carried by said forward pulllink between the slidable parts of said sleeve, the forward slidablepart of said sleeve communicating with-said fixed collar within saidaperture diverting the downward movement of the depending trip leverforwardly reversely breaking said roller trip coupling after printingimpact forreturning the type baivto normal position while the key leveris in depressed position, the rearslidable part of said sleevecommunicating with said fixed stop collar withinsaid aperture absorbingthe excessive recoil percussion of the type bar occasioned by itscontact with its normal cushion rest, means restoring said revers'elybreaking roller trip coupling to normal operative interlocked positionupon release of the key lever. a v 1 l r in a type key action andmechanism, a key lever formed with an upward arm supporting a rollergrip, a rearwardly disposed vibratory lever, means operativelyconnecting the type bar and vibratory lever, a depending trip leveroperatively connected at its upper end to said vibratory leverintermediately theends of the latter extending downwardly and operatingina plane above the key lever, said depending trip lever being minilineal in form, the upper part being straight and the lower partconvened forwardly, the lower end thereof supporting a trip roller boboperatively interlocking with said roller grip moving the type bar toprinting point upon depression of the key lever, means divertingthedownward movement-of said trip lever forwardly reversely breaking saidroller trip coupling after printing impact of the type bar for returningthe vibratory lever and type bar to'norma'l position while key 7 leveris in depressed position, means restoring said disinterlocked elementsto normal operative interlockedposition upon release of the key lever.v,

6. In a key action and mechanism, a type bar, a key lever with an,upward angular arm intermediate of its ends, a rearwardly disposedvibratory lever, a-forward pull link operatively connecting the type barand vibratory lever, a depending trip lever operating said vibratorylever, a trip roller bob pivoted to the lowerend of the depending triplever, a roller grip carried by said key lever arm spool shaped withroller, heads on either side of the depending trip lever, one of therollerheads providing a hollow cylinderhub forming a pivotal axleoperating in 'a hole at the upper end of the key lever arm and the otherroller head providing a cylinder pin tightly shrunk in said cylinderhollow hub, said roller grip operating within the backward concavity ofthe de pending trip lever, operatively interlocking the elements of saidroller trip coupling, moving the vib 'atory lever downwardly and theforward pull link forwardly thereby moving the type bar to printingpoint upon depression of the key lever, a slidable sleeve carried bysaid forward pull link communicating with a fixed collar on said pulllink, an actuating thrust rod carried by said sleeve and depending triplever diverting the clownward movement of said depending trip leverforwardly and swinging said trip roller bob forwardly and upwardly saidroller grip movin out of the backward concavity 0f the depending triplever rcverselydisinterlocking the elements of said roller trip couplingfor returning the vibratory lever, forward pull link and type bar tonormal operative position while the key lever is in depressed position,means restoring said disinterlocked elements to normal interlockedposition upon release of the key lever;

7. In a key action, a type bar, a key lever, arearwardlyl disposedvibratory lever, means operatively connecting the type bar and vibratory lever, a depending trip lever operating the vibratory lever, atrip roller bob carried by the lower end of the depending trip leverspool shaped with roller heads on either side of the depending triplever, one of the roller heads providinga hollow cylinder hub formingthe pivotal axle operating in a hole at the lower end of the dependingtrip lever and the other roller head providing a cylinder pin tightlyshrunk in said hollow cylinder hub, said rollerbob operating within theforward concaved plane provided by the upward curved key leverarm,communicating with and operatively interlocking with said rollergrip behind a reversely breaking line drawn through the diametricalroller grip constituting a coupling for moving the type bar to printingpoint upon depression of the key lever, means reversely breaking saidroller trip coupling after printing impact of the type bar for returninthe type bar to normal posit-ion While the key lever is in depressedposition, means restoring said disi-nterlocked elements tonormaloperative interlocked position upon release of the key lever.

8. In a type key action, a key lever having an upward curved arm, a keylever rest under said key lever, a type bar, a vibratory lever, meansopera-tively connecting the-vibratory lever and key-lever comprising adepending trip lever actuating said vibratory lever,a

reversely breaking roller trip coupling comprising a relatively lar 'eroller grip carried by the key leverarm and a relatively small triproller bob carried by the depending trip lever with their treadscommunicatively in terlocked, the difference in diametrical sise of saidcoacting elements enabling them to more firmly engage in operativeinterlocked posi verting' the downward movement or i pending trip leverand trip roller bob fortion for moving the type bar to printing point upn depress'ni of the key lever, means diverting the movement of saiddepending trip over forwardly, disinterlooking the coacting treads ofthe roller trip coupling, permitting the momentum of the type bar tocarry the latter to prii ting point with a relatively short depressionstroke of the key lever limited by a key lever rest means restoringcoacting treads of the elements 01" the reversely breaking roller tripcoupling to normally operative interlocked position upon release of thekey lever. V

, 9. In a type key action, a type bar, a lover, a rearwardly disposedvibratory lever pivoted at its forward end, a forward pulllinkoperatively coi'inecting the type bar and rear end of the vibr ylever, a reve' y breaking roller trip coupl g operatively interlockingthe depending t ip lever and ey lever arm comprising a roller grip and atrip roller bob oper tively i1 rlockedior mov ing' the type bar to theriing point upon depression of the hey lever, an actuatii thrust rod, aslidable sleeve carried by the forward pul linl: t which the rear one.of the thrust rod is pivoted. and the forward end oi said actuatingthrust rod be pi" QJil to the depending trip lever into ,odiately the LAends of the latter diverting the downward movem nt of the degending triplever for- --a'ardly movi and upwardly inn line drawn roller grip periniWhile key lever said ricallythro ing' trip lever an l operative ositionlever. s

10; In a typcwriting machine, a hey lever having an upwardly exten i v avibratory lever,1neans operatively C'QA' ing the type bar and vibratorylever,'a lever for actuating the vibratory lever, a versely breakingroller trip co": prising a trip roller 1 bob carried by the delever anda roller grip carried U ever arm 'oporatively ii terloel; ed

for noving the type to printing upon depression of the key lever, me

wardly 'diuinterlochingsaid roller trip elements, a butler bar extendir1 the inachine in front otsaid dependins" tr' e'noise absorbing cushionprovided by the lower face of said buli'erbar connnunicatine With theupper edgeo'f the key leverlm mg it deadbutler bar to arrest theforardly diverted rinovement of the depending trio lever ust besaid aeffecting operative alig treads of the respective trip roller hob andfore the type bar strikes the printing point, the inherent resiliency ofsaid butler bar absorbing the momentum oi the type bar transmittedthroughtiie intermediate mechanism permitting the type bar to completeiaLS sector of movement coordinatin inherent rapidity of operation withinherent silence of impression, means reversely breaking said rollertrip mechanism after printing impact of the type bar, the secondfunction of said buil'er bar effecting a relativelyquicker incldent ofrecoil of the type than its incident of response for returning thevibratory lever and forward pull link to normal operative position whilethe key lever is in depressed position, means restoring saiddisinterlocked elements to normal operative interlocked position uponrelease of the key lever.

ll. In a key action, a type ha a forward pull linh actuaing said typebar, a vibratory lever actuating said forward pull link, a dependingtrip lever actuating said vibraorylever, a key lever with an integralarm pwardly curved, reversely breaking roller L number with a series ofvertically disposed i teeth, the lower part 01 the depending trip leveroperating between two of said horizontally disposed teeth and the keylever oper ting bet veen the two corresponding vertically disposed teethrestoring sail depem ingtrip lever to its normal, operative positionnment of the coacting roller grip upon release of the hey lever;

12. In a type key action and mechanism, a

type bar, arearwardly disposed vibratory lever, a forward pull llllKoperatively con- 'ip coupling comprising a trip roller bob necting' thetype bar and vibratory lever, a]

depending trip lever tory lever, a trip roller bob actuating saiddepending trip lever, a key lever providing an upward curved armintermediately of its ends, aroller gripcarried by said arm oper- Vatively interlockingsaid:trip roller bob movi-V V ing the type barto'printing point upon depresslon otthe hey lever, means disinterloclz-111%" said elements permitting; the momentum actuating said vibra-,

of the type bar to move the atter to printing point with relativelyshorter depression stroke of the key lever, the type bar completing itscycle of movement to printing point and back to normal position of restby the action of substantially the first half of the key lever cycle ofmovement, means restoring the reversely breaking trip roller coupling tonormal operative interlocked position of rest by the action of thesecond half of the key lever cycle of movement.

13. In a key action and mechanism, a type bar held in normal position bya type bar rest, a rearwardly disposed vibratory lever, a forward pulllink operatively connecting the type bar and vibratory lever, adepending trip lever actuating said vibratory lever, a key leverproviding a key lever arm, a re- Versely breaking trip link couplingcomprisin g a trip roller bob supported by the depending trip lever anda roller grip carried by the key lever arm moving the type bar toprinting point upon depression of the key lever, a slidable sleevecarried by said forward pull link, an actuating thrust rod operativelyconnecting the trip lever and slidable sleeve, a fixed spring supportcarried by the rear portion of said pull link, an actuating returnspring supported by said spring support and slidable sleeve, said springmoving bodily forwardly beneath said pull link, the tension thereofbeing dormant or ineffective permitting efficacious impact of the typebar upon relatively light depression stroke of the key lever, a fixedstop collar carried by the central portion of said pull linkcommunicating with the forward slidable part of I said sleeve divertingthe downward movement of the depending trip lever forwardly reverselybreaking said coupling after printing impact of the type bar, saidroller grip holding the trip roller bob and the depending trip lever intheir forwardly diverted position and in turn the actuating thrust rodby means of the slidable sleeve energizing said spring by the recoilenergy of the type bar neutralizing the recoil percussion of said typebar occasioned by the contact with the type bar rest, means releasingthe energy of said spring slidings said sleeve backwardly effectingbackward movement of said actuating thrust rod restoring the dependingtrip lever to normal operative position upon release of the key lever.

Signed at Fort Collins, in the county of Larimer and State of Colorado,this 24 day of J an., A. D. 1928. p

ORVILLE'U. DESHA.

